Carbonate-hosted base metal deposits

lead isotope data bearing on their genesis and exploration.

M. Vaasjoki, B. L. Gulson

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Four Australian carbonate-hosted Pb-Zn deposits have different Pb isotope patterns. The distinctive Pb isotope compositions persist through weathering, an observation of use in gossan evaluations. Comparison of the Australian data on a global basis identifies two main groups of isotope patterns: 1) homogeneous Pb isotope compositions, with a radiogenic subdivision and 2) heterogeneous compositions that are generally radiogenic. Lateral secretion is the favoured origin for carbonate-hosted deposits with: 1) homogeneity dependent on proximity of the ores to deep sedimentary basins (a form of mixing vat) and 2) radiogenic Pb as a function of the age difference between the host carbonate and the crystalline basement.-G.J.N.

Original languageEnglish
Pages (from-to)156-172
Number of pages17
JournalEconomic Geology
Volume81
Issue number1
DOIs
Publication statusPublished - 1986
Externally publishedYes

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